[ jEdit-users ] Startup failure after upgrade to 5.2pre1 on ubuntu 12.04

[Vladimir A. <vl...@ya...>]

Hi,
I just updated Sessions plugin in jedit 05.01.99 and the plugin failed to start the following message taken from console terminal:
8:40:21 AM [main] [error] ErrorListDialog$ErrorEntry: /home/vladimir/.jedit/jars/Sessions.jar:
8:40:21 AM [main] [error] ErrorListDialog$ErrorEntry: Cannot start: java.lang.UnsupportedClassVersionError: sessions/SessionsPlugin : Unsupported major.minor version 51.0
8:40:21 AM [main] [error] ErrorListDialog$ErrorEntry: Try updating to a newer version of the plugin.

 I decided it is time to upgrade to 5.2, but after upgrade jedit failed to start alltogether:

$ sudo dpkg -i jedit_5.2pre1_all.deb 
(Reading database ... 745974 files and directories currently installed.)
Preparing to replace jedit 5:05.01.99.00 (using jedit_5.2pre1_all.deb) ...
Unpacking replacement jedit ...
Setting up jedit (5:05.02.01.00) ...
Processing triggers for man-db ...

$ jedit 
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/gjt/sp/jedit/jEdit : Unsupported major.minor version 51.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
        at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
Could not find the main class: org.gjt.sp.jedit.jEdit. Program will exit.


Starting with -noplugins or -nosettings gave same result. I rolled back to 5.1 for now.

The machine details are below:
$ cat /etc/issue                                                                                           
Ubuntu 12.04.5 LTS \n \l                                                                                   

$ uname-a                                                                                                 
Linux am4tosh 3.2.0-68-generic #102-Ubuntu SMP Tue Aug 12 22:02:15 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux 

$ java -version
java version "1.6.0_32"
OpenJDK Runtime Environment (IcedTea6 1.13.4) (6b32-1.13.4-4ubuntu0.12.04.2)
OpenJDK 64-Bit Server VM (build 23.25-b01, mixed mode)



Best regards,
Vladimir